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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * accompanied this code).
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package java.beans.beancontext;

import java.beans.PropertyChangeListener;
import java.beans.VetoableChangeListener;
import java.beans.PropertyVetoException;

import java.beans.beancontext.BeanContext;



JavaBeans wishing to be nested within, and obtain a reference to their
execution environment, or context, as defined by the BeanContext
sub-interface shall implement this interface.




Conformant BeanContexts shall as a side effect of adding a BeanContextChild
object shall pass a reference to itself via the setBeanContext() method of
this interface.




Note that a BeanContextChild may refuse a change in state by throwing
PropertyVetoedException in response.




In order for persistence mechanisms to function properly on BeanContextChild
instances across a broad variety of scenarios, implementing classes of this
interface are required to define as transient, any or all fields, or
instance variables, that may contain, or represent, references to the
nesting BeanContext instance or other resources obtained
from the BeanContext via any unspecified mechanisms.



Author:     Laurence P. G. Cable
See Also:
Since:      1.2
/**
 * <p>
 * JavaBeans wishing to be nested within, and obtain a reference to their
 * execution environment, or context, as defined by the BeanContext
 * sub-interface shall implement this interface.
 * </p>
 * <p>
 * Conformant BeanContexts shall as a side effect of adding a BeanContextChild
 * object shall pass a reference to itself via the setBeanContext() method of
 * this interface.
 * </p>
 * <p>
 * Note that a BeanContextChild may refuse a change in state by throwing
 * PropertyVetoedException in response.
 * </p>
 * <p>
 * In order for persistence mechanisms to function properly on BeanContextChild
 * instances across a broad variety of scenarios, implementing classes of this
 * interface are required to define as transient, any or all fields, or
 * instance variables, that may contain, or represent, references to the
 * nesting BeanContext instance or other resources obtained
 * from the BeanContext via any unspecified mechanisms.
 * </p>
 *
 * @author      Laurence P. G. Cable
 * @since       1.2
 *
 * @see java.beans.beancontext.BeanContext
 * @see java.beans.PropertyChangeEvent
 * @see java.beans.PropertyChangeListener
 * @see java.beans.PropertyVetoException
 * @see java.beans.VetoableChangeListener
 */

public interface BeanContextChild {

    

Objects that implement this interface,
shall fire a java.beans.PropertyChangeEvent, with parameters:
propertyName "beanContext", oldValue (the previous nesting
BeanContext instance, or null),
newValue (the current nesting
BeanContext instance, or null).


A change in the value of the nesting BeanContext property of this
BeanContextChild may be vetoed by throwing the appropriate exception.



Params:
  • bc – The BeanContext with which
to associate this BeanContextChild.
Throws:
/**
     * <p>
     * Objects that implement this interface,
     * shall fire a java.beans.PropertyChangeEvent, with parameters:
     *
     * propertyName "beanContext", oldValue (the previous nesting
     * <code>BeanContext</code> instance, or <code>null</code>),
     * newValue (the current nesting
     * <code>BeanContext</code> instance, or <code>null</code>).
     * <p>
     * A change in the value of the nesting BeanContext property of this
     * BeanContextChild may be vetoed by throwing the appropriate exception.
     * </p>
     * @param bc The <code>BeanContext</code> with which
     * to associate this <code>BeanContextChild</code>.
     * @throws PropertyVetoException if the
     * addition of the specified <code>BeanContext</code> is refused.
     */
    void setBeanContext(BeanContext bc) throws PropertyVetoException;

    
Gets the BeanContext associated
with this BeanContextChild.

Returns:the BeanContext associated
with this BeanContextChild.
/**
     * Gets the <code>BeanContext</code> associated
     * with this <code>BeanContextChild</code>.
     * @return the <code>BeanContext</code> associated
     * with this <code>BeanContextChild</code>.
     */
    BeanContext getBeanContext();

    
Adds a PropertyChangeListener
to this BeanContextChild
in order to receive a PropertyChangeEvent
whenever the specified property has changed.

Params:
  • name – the name of the property to listen on
  • pcl – the PropertyChangeListener to add
/**
     * Adds a <code>PropertyChangeListener</code>
     * to this <code>BeanContextChild</code>
     * in order to receive a <code>PropertyChangeEvent</code>
     * whenever the specified property has changed.
     * @param name the name of the property to listen on
     * @param pcl the <code>PropertyChangeListener</code> to add
     */
    void addPropertyChangeListener(String name, PropertyChangeListener pcl);

    
Removes a PropertyChangeListener from this
BeanContextChild  so that it no longer
receives PropertyChangeEvents when the
specified property is changed.

Params:
  • name – the name of the property that was listened on
  • pcl – the PropertyChangeListener to remove
/**
     * Removes a <code>PropertyChangeListener</code> from this
     * <code>BeanContextChild</code>  so that it no longer
     * receives <code>PropertyChangeEvents</code> when the
     * specified property is changed.
     *
     * @param name the name of the property that was listened on
     * @param pcl the <code>PropertyChangeListener</code> to remove
     */
    void removePropertyChangeListener(String name, PropertyChangeListener pcl);

    
Adds a VetoableChangeListener to
this BeanContextChild
to receive events whenever the specified property changes.

Params:
  • name – the name of the property to listen on
  • vcl – the VetoableChangeListener to add
/**
     * Adds a <code>VetoableChangeListener</code> to
     * this <code>BeanContextChild</code>
     * to receive events whenever the specified property changes.
     * @param name the name of the property to listen on
     * @param vcl the <code>VetoableChangeListener</code> to add
     */
    void addVetoableChangeListener(String name, VetoableChangeListener vcl);

    
Removes a VetoableChangeListener from this
BeanContextChild so that it no longer receives
events when the specified property changes.

Params:
  • name – the name of the property that was listened on.
  • vcl – the VetoableChangeListener to remove.
/**
     * Removes a <code>VetoableChangeListener</code> from this
     * <code>BeanContextChild</code> so that it no longer receives
     * events when the specified property changes.
     * @param name the name of the property that was listened on.
     * @param vcl the <code>VetoableChangeListener</code> to remove.
     */
    void removeVetoableChangeListener(String name, VetoableChangeListener vcl);

}